Unified Code for Units of Measure

The Unified Code for Units of Measure (UCUM) is a system of codes for unambiguously representing measurement units. Its primary purpose is machine-to-machine communication rather than communication between humans.^[1]

The code set includes all units defined in ISO 1000, ISO 2955-1983,^[2]^[a] ANSI X3.50-1986,^[3]^[b] HL7 and ENV 12435, and explicitly and verifiably addresses the naming conflicts and ambiguities in those standards to resolve them. It provides for representations of units in 7 bit ASCII for machine-to-machine communication, with unambiguous mapping between case-sensitive and case-insensitive representations.

A reference open-source implementation is available as a Java applet. There is also an OSGi-based implementation at Eclipse Foundation.

^ "UCUM". The UCUM Organization. Retrieved May 1, 2019.
^ ISO 2955:1983 Information processing — Representation of SI and other units in systems with limited character sets [1]
^ FLOWCHART SYMBOLS AND THEIR USAGE IN INFORMATION PROCESSING

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[UCUM_Home-1] "UCUM". The UCUM Organization. Retrieved May 1, 2019.

[2] ISO 2955:1983 Information processing — Representation of SI and other units in systems with limited character sets [1]

[4] FLOWCHART SYMBOLS AND THEIR USAGE IN INFORMATION PROCESSING

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Unified Code for Units of Measure

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